/*========================== begin_copyright_notice ============================

Copyright (C) 2017-2021 Intel Corporation

SPDX-License-Identifier: MIT

============================= end_copyright_notice ===========================*/

#pragma once

#include "common/LLVMWarningsPush.hpp"
#include <llvm/Pass.h>
#include <llvm/IR/InstVisitor.h>
#include "common/LLVMWarningsPop.hpp"

namespace IGC {
// A pass that walks over call instructions and replaces all __builtin_IB_work_group
// with corresponding GenISA intrinsics.
//
class WGFuncResolution : public llvm::ModulePass, public llvm::InstVisitor<WGFuncResolution> {
public:
  // Pass identification, replacement for typeid
  static char ID;

  /// @brief  Constructor
  WGFuncResolution();

  /// @brief  Provides name of pass
  virtual llvm::StringRef getPassName() const override { return "WGFuncResolution"; }

  virtual void getAnalysisUsage(llvm::AnalysisUsage &AU) const override { AU.setPreservesCFG(); }

  // Entry point of the pass.
  virtual bool runOnModule(llvm::Module &M) override;

  // Call instructions visitor.
  void visitCallInst(llvm::CallInst &callInst);

private:
  llvm::Module *m_pModule = nullptr;

  /// @brief  Indicates if the pass changed the processed function
  bool m_changed{};
};

} // namespace IGC
